convert each element of QVector<double> to QString and save in a text file

[Alex22]

Hi,
there is a QVector<double> in name of "v1". Size of "v1" is 1000. I need to convert all this 1000 elements to QString (or convert to a QStringList) and then save this list into a text file. Please help me in this way.

thanks

[Lesiok]

Read about QString::number

[anda_skoa]

If you want to save directly into the file, see QTextStream.

Cheers,
_

[Alex22]

Read about QString::number

thanks Lesiok,
I used this:


for(int y=0; y<v1.size(); y++)
{
qDebug()<< QString("%1").arg(v1.at(y));
}


how could i save this in a file (text type) in a one column?

[ChrisW67]

See anda_skoa's post above.

[Alex22]

Thanks all
I used this and works well:


QStringList list;
for(int y=0; y<v1.size(); y++)
{
list<< QString("%1").arg(v1.at(y));
}


QFile g1f;
g1f.setFileName("test.txt");
if(!g1f.open(QFile::WriteOnly | QFile::Text))
{
qDebug()<<"can not open to write";
}

QTextStream df(&g1f);
for ( QStringList::Iterator it = list.begin(); it != list.end(); ++it )
df << *it << "\n";

g1f.flush();
g1f.close();


is there an optimal way to convert QVector<double> to QStringList? can we do this by QVector::toList()?

[anda_skoa]

The most optimal way is to not create the string list.

Cheers,
_